HelloThis is my story of how I went when I wanted to build the ultimate bass amp.Here is the story of “Tower of Power” as they were baptized rather quickly when the project was revealed among the local DIY community.First of all I wanted two dedicated mono subwoofer amps that bettered the Crown K2s they were to replace.After having read and heard a lot of positive stuff about these Aussie Amps, I felt they fulfilled my pre defined criteria very well.Class AB, high power, high damping factor with many output devices and what seemed to be good quality parts.Second I wanted an unusual design, that also limited the floorspace needed, since my livingroom was already crowded by horns and and electronics.After a lot of research I landed on building a pair of Holton 800s, but in a vertical arrangement instead of the classic rack style cabinetBy coincidence I came across...

Having upgraded my speakers I was looking for something a little better then my monobloc chip-amps, but wanted to keep the chassis as there a good fit with the rest of my system.So using 45V rails and 20,000uf per unit, in went the HPA-nxV200 modules.The first thing that struck me was the improvment in the bass, very quick and tight.The treble was smooth and detailed, and the resolution just outstanding!I'm very happy with the results.RegardsMark G. Melbourne, Australia

HPA-nxV200 Stereo AmplifierHi Anthony!After building my new power amp, I would like to give you a short description of the unit itself. Due to the fact that these amp modules are so incredibly small, I decided to go for a rather small amp. So I was able to go for a smaller transformer, less smoothing capacitance, smaller heatsinks and, of course, a smaller enclosure. I used a fully encapsulated 250VA toroid transfomer with 2x24V secondaries, a 15A/200V bridge rectifier, 4x 10.000uF/50V Panasonic TS-HA caps and two heatsinks with 1,7k/W each. The enclosure is a very rigid steel case of Monacor International.I decided to build the amp without any input coupling caps at all, because I like to do some "cap rolling", and this way it will be possible to change the caps whenever I want to. At the moment the best I have to hands are some Black Gate N...